Soy protein isolate–guar gum–goose liver oil O/W Pickering emulsions that remain stable under accelerated oxidation at high temperatures

化学 大豆蛋白 絮凝作用 表观粘度 多糖 接触角 果胶 乳状液 化学工程 Zeta电位 流变学 色谱法 食品科学 材料科学 有机化学 工程类 纳米颗粒 复合材料
作者
Xiankang Fan,Chun‐Wei Li,Zihang Shi,Qiang Xia,Lihui Du,Changyu Zhou,Daodong Pan
出处
期刊:Journal of the Science of Food and Agriculture [Wiley]
卷期号:104 (2): 1107-1115 被引量:6
标识
DOI:10.1002/jsfa.12996
摘要

Goose liver oil (GLO) is a solid-liquid mixture, rich in polyunsaturated fatty acids and high in nutritional value, but poor in fluidity and easily oxidized. Therefore, oil-in-water (O/W) Pickering emulsions of three polysaccharides and soy protein isolate (SPI) with GLO were prepared to improve the stability of it.Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE), Fourier-transform infrared spectroscopy, and zeta potential revealed that the SPI and complexes with konjac glucomannan, pectin, and guar gum (GG) ranged from 17 to 75 kDa, with the site of action being the -OH stretch and the amide group, and bound by hydrogen bonding. Adding konjac glucomannan and GG significantly increased the water contact angle of the SPI to 74.1° and 59.0°, respectively. Therefore, the protein-polysaccharide complexes could enhance the emulsion stability. In addition, the O/W Pickering emulsions with GLO had near-Newtonian fluid rheological properties with a significant increase in apparent viscosity and viscoelasticity, forming a dual network structure consisting of a ductile and flexible protein network and a rigid and brittle polysaccharide network. The microstructure observation indicated that the O/W emulsions were spherical and homogeneous. The highest emulsification activity was observed for the SPI-GG-GLO emulsions, without significant delamination or flocculation and high oxidative stability after 7 days in storage.These results demonstrate that the construction of SPI-GG-GLO O/W Pickering emulsions can stabilize GLO even at high temperatures that promote oxidation. © 2023 Society of Chemical Industry.
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